Yun Rev 2 leds


Is there a description of the behavior of the Yun Rev 2 leds?

Sometimes the builtin led blinks also when I am not using it in my sketch.
Yesterday the Tx led lit on and it staid on all the time, no matter which sketch I uploaded, also when the Yun was powered from a battery, without connection. I reconfigured the Yun and now it stays off...

Thank you very much for the information

It looks like when the L led is flashing the sketch does not work anymore, it happens also with the simple Blink.ino sketch